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CVE-2026-13188

DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX

MEDIUM
5.9
CVSS Score
Published: July 22, 2026 at 01:41 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorTelerik UI for ASP.NET AJAX

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Telerik UI for ASP.NET AJAX· Progress
95%
2011.2712 ≤ v < 2026.2.7082011.2.712
Affected range stops below 2026.2.708, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryMitigation
Source: cverecord
https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-parameters-tampering-CVE-2026-13188

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMProgressSoftware
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-345

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